太阳能路灯的原理 物理（The principle physics of solar street lamps）.doc

太阳能路灯的原理 物理（The principle physics of solar street lamps） The physics of voltage and current of solar street lamp uses solar energy during the day, charging at night, without complicated and expensive pipeline laying, adjustable lighting layout, safety and energy saving and no pollution, without manual operation is stable and reliable, saving electricity and maintenance free. 1. system. The system comprises a solar battery component part (including bracket), LED lamp, control box (with controller, battery and lamp) several parts of Beijing; Tianzhu sunshine solar panels light efficiency reached 127Wp/m2, higher efficiency, is favorable for the wind resistant design of the system; the lamp head to 1W-5W white LED and 1W-5W yellow light LED integrated on the printed circuit board is arranged in a certain distance matrix as plane light source. Control box with stainless steel, beautiful and durable; the control box placed maintenance free lead-acid battery charge and discharge controller. This system chooses the VRLA battery, because of its little maintenance, so it is also called maintenance free battery, the system is conducive to the maintenance cost is reduced; the charge and discharge controller both functions in the design (with light control, time control, overcharge protection, over discharge protection and reverse protection etc.) and cost control, to achieve a very high price. 2. working principle The working principle of the system is simple, the use of solar photovoltaic panels during the day the principle of solar radiation and into electrical energy output, through the charging and discharging controller is stored in the accumulator. When night illumination gradually reduced to about 10lux, Changsha photosynthetic solar panels open circuit voltage of about 4.5V, the charge and discharge controller to detect the voltage value of the battery, discharge lamp. After 8.5 hours of battery discharge, charge and discharge controller action, the battery discharge e